Summary of Significant Accounting Pronouncements - Reclassifications (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Non-cash Activity, Increase (Decrease) in Performance Guarantees	$ 23,765	$ (6,528)	$ 4,941
Equity in net income from unconsolidated joint ventures	(72,764)	(101,747)	(67,845)
Increase (Decrease) in Equity in Construction Joint Venture		0	0
Equity in construction joint ventures	(40,758)	(4,986)	(800)
Distributions from unconsolidated construction joint ventures	110,347	92,474	35,598
Accrued expenses and other current liabilities, net	(25,021)	(3,700)	20,578
Increase (Decrease) in Equity in Construction Joint Venture Including Accrued Expenses and Other Current Liabilities		(17,959)	(12,469)
Scenario, Previously Reported [Member]
Equity in net income from unconsolidated joint ventures		0	0
Increase (Decrease) in Equity in Construction Joint Venture		2,446	(26,313)
Equity in construction joint ventures		0	0
Distributions from unconsolidated construction joint ventures		0	0
Accrued expenses and other current liabilities, net		(20,405)	13,844
Increase (Decrease) in Equity in Construction Joint Venture Including Accrued Expenses and Other Current Liabilities		(17,959)	(12,469)
Scenario, Adjustment [Member]
Non-cash Activity, Increase (Decrease) in Performance Guarantees		(6,500)	(4,900)
Equity in net income from unconsolidated joint ventures		(101,747)	(67,845)
Increase (Decrease) in Equity in Construction Joint Venture		(2,446)	26,313
Equity in construction joint ventures		(4,986)	(800)
Distributions from unconsolidated construction joint ventures		92,474	35,598
Accrued expenses and other current liabilities, net		16,705	6,734
Increase (Decrease) in Equity in Construction Joint Venture Including Accrued Expenses and Other Current Liabilities		$ 0	$ 0